Improvement in leather-scarfing machines



tln'ited' States stent dimite.

Let-ters Patent No. 100,890, dated March 15, 1870.

IMPROVEMENT IN LEATHIElR-SCARFING- MACHINES.

The Schedule referred to in these Letters Patent and making part of the saine.

To all whom fit may concer-n:

Be it known that I, CHARLES H. HELMs, of Poughkeepsie, Dutchess county, and State of New York, have invented certain new and useful Improvements in Scarfing-il/Iaohines; and I do hereby declare that thc following is a full description of the same.

'lhe nature of my invention consists- First, in the use of a wedge-pointed screw, in conibination with the side of the frame and adjustable .roller-box, for the purpose of controlling the set of the rollers between which the leather is scarfed.

-ing rollers, and heilig acted upon by the knife; but, to

describe my invention more particularly, I will refer to the accompanying drawings forming a part of this specification, the same letters of reference, wherever they occur, referring to like parts.

Figure 1 is a front side view of the scartiiig-machine:

Figure V2 is a side view of the same.

Letter A represents the frame of the machine, in which is arranged ahorizontal propelling-shaft, B, having on its back end a driving-pulley, C, and a driving cog-wheel, D, and its front end a roller, E, as the `lowell roller ofthe two scarng-rollers.

l Directly' above this lower roller isa second roller,

` Il, arranged or secured on the end of an axis, G, (working in an adjustable sliding box, H, secured between the cheeks or sides of the frame A,) and having on its backend a cog-wheel, I, to engage into the cogwheel D, so that a simultaneous and uniform rotary motion will be given to the scarling-rollers.

For the purpose of adjusting the' set of the rollers to dili'erent thicknesses of leather, a wedge-pointed screw, J, or other equivalent device, is inserted through the .side of the frame A on a line with thelower edge of the sliding box H, so that, by graduating'the set of the screw, the box will be elevated, and with it the roller secure-d therein, and thus accommodate the admission of leather of any thickness.

To keep the pressure of the roller uniform on the leather, and to accommodate unequal thicknesses of it, a spiral spring, Kis secured in a box or cap, L, attached to the frame A, so as to admit of the lower end of the spring to press upon the upper side of the box H, and thus, by the set of the adjusting-screw M, any amount of tension may be given to the spring to hohl the leather securely while being scarfed by the knife N. j

This knife is secured by a set-screw to an adjustable holder, P, Iliade in the shape of a right-angled lever, and secured by a center-pin or screw, Q. to a vertically-adjusting sliding plate, R, workingin guideways in the side ofthe frame A. The object of this right-angled lever-shaped knife-holder is to admit of the set of the edge of the knife obliqnely across the space between the upper and lower rollers, so as to scarf or cut away one edge of the piece of leather to any thickness required and to accomplish this object, two adjusting-screws, S, are arranged in ear pieces T on the sliding-plate R, at opposite sides ofthe pendent arm p2 ofthe knife-holder P, so that, bythe set of these two screws, the edge of the knife will be set to any inclination across the space between the scarngrollers desired.

To elevate or depress the knifeaccording to thev thickness of the piece of leather to be operated on, the sliding plate R is made adjustable up and down by means of a set-screw, U, working througha stationary shoulder, V, at the head of the frame A, and into a female screw secured to the upper end of the sliding plate.

Having now described my invention, I will proceed tojset forth what I claim-and desire to secure by Letters Patent of the United States:

1. 1n a machine for scarfing leather, the hereinbefore-described manner of' regulating the thickness of the scarf by means of the wedge-pointed screw or equivalent device, acting upon the sliding box H, carrying the roller F, substantially as hereinbefore set forth.

2. The adjustable knife-holder P, when made as hereinbefore described, in combination with the adjusting-screws S, and adjstable sliding plate R, all arranged and`operatingsubstantially as described. v

3. In combination, the spiral spring K, sliding-box H, and wedge-pointed screw J, for the purpose of regulating the pressure ofthe roller F on the piece of leather while being scar-fed. i

CHARLES H. HELMS. iVitnesses:

FRANKLIN BARRITT, CHARLES L. BARnlts'r. 

